Gas-burner.



No. 823,308. PATENTBD JUNE 12, 1906. H. sssMANN.

GAS BURNER.'

APPLIOATION FILED PEB. 26. 1904.

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NITED STATES PATENT OFFICE.

HEINRICH SSSMANN, OF BERLIN,

GERMANY, ASSIGNOR TO DEUTSCHE FIRM.

GAS-BURNER.

Specification of Letters Patent.

Patented June 12, 1906.

Application led February 26| 1904;. Sllal N0. 195,360.

To all whom, it ma/ z/ concern:

Be it known that I, HEINRICH SssMANN, manager, a subject of the GermanEmperor, residing at 144 Alte Jacobstrasse, Berlin, in the Empire ofGermany, have invented certain new and useful Improvements in Gas-Burners, of which the following is a specification.

Nozzles with adjustable outlet-apertures for Bunsen burners arealready-known, which consist of a cap open at its lower part and cutinto a number of parts, these parts being adapted to be compressed to agreater or less extent by means of a nut screwed over them.

The regulating device, which forms the subject of this application,differs from these known nozzles, owing to the fact that theadjustmentof the outlet-slit in the divided cap is produced by itsadjustability relatively to a restriction in the nozzle-casing whichreceives it. This adjustment may be effected by means of a set-screw,for example.

The restriction in the nozzle-casing may consist of a cone of greater orless length, against which the front end of the cap is displaced,thereby cau'sing the divided portions of the cap to yield relatively oneto the other. By reducing the outlet-aperture when the gas-pressureincreases and enlar ing it when the pressure decreases the quantity ofgas issuing from the nozzle may be maintained constant. The velocitywith which the gas enters the mixing-chamber thus varies with themagnitude of the gas-pressure.

If it is desired to maintain the discharge velocity constant as well asthe quantity discharged, this may be effected in accordance with thisinvention by providing that the adjustable cap shall not itself form theoutletaperture directly, a special mouthpiece, with invariableoutlet-apertures, being arranged above the said adjustable cap. In thismanner an increase of the discharge velocity as a result of therestriction of the discharge-aperture of the adjustable cap is obviated.A collecting or pressure' chamber may thus be formed between theoutlet-mouthpiece and the adjustable cap which chamber facilitates theuniform discharge of the gas. In this case, therefore, the adjustment tosuit the gas-pressure for the time being merely produces a regulation ofthe quantity of the gas discharged, while the discharge velocity at thenozzle-mouthpiece is not altered, or not to any appreciable extent. Thisnovel nozzle is illustrated in two constructionalforms in theaccompanying drawings-that is to say in Figures l, 2, and 3-with asingle cap with adjustable slit-apertures, of which Fig. l is anelevation of burner and mantle. Fig. 2 is a sectional elevation, andFig. 3 is a plan view, with'the mixing-tube omitted. Figs. 4, 5, and 6represent a constructional form with a cap resenting adjustableslitapertures and with special mouthpiece with invariabledischarge-apertures. Fig. 4 is a sectional elevation. Fi 5 is a planview with the mixing-tube omitted, and Fig. 6 is a section on the line l1 of Fig. 4.

The nozzle-casing a is similar to an ordinary five-hole nozzle. It maybe made in one piece, Fig. 2, or in two pieces, Fig. 4. A

tightly-working lateral screw c is introduced,

through its wal this screw being formed with a 'iineI -tapering conicalpoint. By means of this point the cap b, which is divided by twocontinuous slits into four divisions, may be raised or lowered. As thecap its other end against a conical restriction e of the nozzle-Casin a,by tightening up the screw c the yieldin walls of the cap arecompressed, so that t e slit-apertures become narrower. Theconically-tapering screwpoint acts in .the manner of a wedge ineffecting this. When the screw is slackened, the cap moves back againstthe inclined faces e, owing to the pressure of the parts, which tend toseparate. By making the taper on the screw-point Very gradual theregulation of the flow of gas may be very nicely effected. In order toprevent the cap or socket from falling down if the screw c should bewithdrawn too far, a second small screw or pin d may be provided-say inthe hollow of the nozzlecasing beneath the cap.

Above the adjustable slit-apertures (see Figs. 4 to 6) the chamber h maybe provided,

b bears at i this chamber being closed externally by themouthpiece-plate ft, which contains the invariable outletapertures. Thischamber 7L serves as a collecting and pressure-equalizing reservoir andassists in producing the uniform discharge ofthe gas from the invariableapertures in the plate '1., While by means of the set-screw c theslit-apertures in the cap b are adjusted in agreement With theprevailing gas-pressure.

IOO

All thearts may vary from those illusi trated in t e drawings in theirconstruction. Instead of two intersecting slits in the cap IIO eitherone such slit or three or more may be provided. In place of theset-screw with conically-tapering point any other suitable device may beemployed for displacing the capi It is immaterial whether the Bunsenburner is upright, downwardly directed, or inclined. The main feature isthat in all cases it is possible to maintain constant the quantity ofgas discharged and also, if desired, the discharge velocity with varyinggas-pressure by adjusting the slit-apertures in such a manner that theproper mixing proportion between gas and air may be maintained in theBunsen burner.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-- l. A gas-burner, comprising a nozzle-casing having aninternal beveled surface inclinin'g downwardly and outwardly, a, slittedspring-cap mounted to slide in the casing and having its upper endtapering inwardly and upwardly, and a screw having a pointed end andmounted in the casing with its pointed end projecting into said casingbelow the lower end of the cap, whereby the slits of the cap arecontracted when the cap 'is moved upwardly.

2. A gas-burner comprising a nozzle-casing having an internal beveledsurface inclining downwardly and outwardly, a slittedspring-compressible cap adapted to slide lengthwise ofthe casing andhaving its upper end tapering inwardly an d upwardly, a screw projectingwith its pointed end into said casing and adapted to adjust the caplengthwise and support it in all positions, and means projecting intothe easing for preventing said cap from falling out.

3. A gas-burner comprising a nozzle-casing having a detachablehead-piece provided with an internal beveled surface, a slitted springcompressible cap adapted to slide lengthwise of said head-piece andhaving a beveled upper outer end, an adjusting-screw projecting into thecasing below the headpiece and the cap and adapted to support the cap inall positions, and means also projecting into the casing below the cap,for prevent- Ying said cap from falling out.

4. A gas-burner, comprising a nozzle-casing having an internal beveledsurface and above the beveled surface, a chamber having an apertured topplate, a slitted spring-cap in the casing and having a beveled upperend, and a screw having a pointed end and mounted in the casing with itspointed end projecting into the said casing below the lower end of thesaid cap.

5. A gas-burner, comprising a nozzle-casing having an internal beveledsurface inclining downwardly and outwardly and above said surface achamber having an apertured top plate, a slitted spring-cap in thecasing and having its upper end beveled inwardly and upwardly, and ascrew having a pointed end and mounted in the casing with its pointedend projecting into the casing below the lower end of the cap.

In testimony whereof I have hereunto set my hand, in presence of twosubscribing witnesses, this 12th day of February, 1904.

HEINRICH SSSMANN.

Witnesses WOLDEMAR HAUPT, HENRY HAsrER.

